diff --git a/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs
new file mode 100644
index 0000000000..bfe6af3aa2
--- /dev/null
+++ b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs
@@ -0,0 +1,91 @@
+using System;
+
+namespace Volo.Abp.Http
+{
+    /// <summary>
+    /// Used to store information about an error.
+    /// </summary>
+    [Serializable]
+    public class RemoteServiceErrorInfo
+    {
+        /// <summary>
+        /// Error code.
+        /// </summary>
+        public int Code { get; set; }
+
+        /// <summary>
+        /// Error message.
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <summary>
+        /// Error details.
+        /// </summary>
+        public string Details { get; set; }
+
+        /// <summary>
+        /// Validation errors if exists.
+        /// </summary>
+        public RemoteServiceValidationErrorInfo[] ValidationErrors { get; set; }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        public RemoteServiceErrorInfo()
+        {
+
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        /// <param name="message">Error message</param>
+        public RemoteServiceErrorInfo(string message)
+        {
+            Message = message;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        /// <param name="code">Error code</param>
+        public RemoteServiceErrorInfo(int code)
+        {
+            Code = code;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        /// <param name="code">Error code</param>
+        /// <param name="message">Error message</param>
+        public RemoteServiceErrorInfo(int code, string message)
+            : this(message)
+        {
+            Code = code;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        /// <param name="message">Error message</param>
+        /// <param name="details">Error details</param>
+        public RemoteServiceErrorInfo(string message, string details)
+            : this(message)
+        {
+            Details = details;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
+        /// </summary>
+        /// <param name="code">Error code</param>
+        /// <param name="message">Error message</param>
+        /// <param name="details">Error details</param>
+        public RemoteServiceErrorInfo(int code, string message, string details)
+            : this(message, details)
+        {
+            Code = code;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorResponse.cs b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorResponse.cs
new file mode 100644
index 0000000000..f2ecd1f591
--- /dev/null
+++ b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorResponse.cs
@@ -0,0 +1,12 @@
+namespace Volo.Abp.Http
+{
+    public abstract class RemoteServiceErrorResponse
+    {
+        public RemoteServiceErrorInfo Error { get; set; }
+
+        /// <summary>
+        /// A special signature of ABP.
+        /// </summary>
+        public bool __abp { get; } = true;
+    }
+}
\ No newline at end of file
diff --git a/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceValidationErrorInfo.cs b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceValidationErrorInfo.cs
new file mode 100644
index 0000000000..1a84ae2c29
--- /dev/null
+++ b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceValidationErrorInfo.cs
@@ -0,0 +1,60 @@
+using System;
+
+namespace Volo.Abp.Http
+{
+    /// <summary>
+    /// Used to store information about a validation error.
+    /// </summary>
+    [Serializable]
+    public class RemoteServiceValidationErrorInfo
+    {
+        /// <summary>
+        /// Validation error message.
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <summary>
+        /// Relate invalid members (fields/properties).
+        /// </summary>
+        public string[] Members { get; set; }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceValidationErrorInfo"/>.
+        /// </summary>
+        public RemoteServiceValidationErrorInfo()
+        {
+
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceValidationErrorInfo"/>.
+        /// </summary>
+        /// <param name="message">Validation error message</param>
+        public RemoteServiceValidationErrorInfo(string message)
+        {
+            Message = message;
+        }
+        
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceValidationErrorInfo"/>.
+        /// </summary>
+        /// <param name="message">Validation error message</param>
+        /// <param name="members">Related invalid members</param>
+        public RemoteServiceValidationErrorInfo(string message, string[] members)
+            : this(message)
+        {
+            Members = members;
+        }
+
+        /// <summary>
+        /// Creates a new instance of <see cref="RemoteServiceValidationErrorInfo"/>.
+        /// </summary>
+        /// <param name="message">Validation error message</param>
+        /// <param name="member">Related invalid member</param>
+        public RemoteServiceValidationErrorInfo(string message, string member)
+            : this(message, new[] { member })
+        {
+
+        }
+    }
+}
\ No newline at end of file